LMZ31704EVM-003

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The LMZ31704EVM-003 is a fully featured Evaluation Module (EVM) from Texas Instruments. It is designed to serve as a platform for evaluation, design prototyping, and product development for offline, AC/DC and DC/DC switching power supplies. This EVM is evaluated for safety standards such as UL/CUL/EN60950-1 including the 2xMOPP isolation.

This EVM is a compact solution optimized for space conscious designs. It has an input voltage range of 70V DC to 265V AC and can provide an output power of up to 24W. It features a programmable input voltage range to allow for flexibility in design. The unit also offers low standby power consumption, up to 15% lower than traditional solutions, allowing for energy savings in applications.

This board uses the LMZ31704 switching regulator. This chip is designed for a variety of offline power supplies, including laptop adapters, UPS systems, and Ethernet POE applications. It has a wide input voltage range between 4.5V and 26V, and an output voltage range of 0.8V to 5.2V. It is capable of up to 2 A of current, and features a current limit function for increased safety in the system.

The LMZ31704EVM-003 provides an output voltage and current selection feature which can be programmed through the EVM’s graphical user interface. The board features a comprehensive suite of protection features including over current, short circuit, over temperature, and line transient protection. The LMZ31704EVM-003 also has over voltage protection to protect the load in case of faults.

This board operates in Pulse Width Modulation (PWM) mode to control the output voltage. It uses a fixed frequency (400 kHz) oscillator with spread spectrum modulation to reduce conducted and radiated EMI noise, allowing it to meet the requirements of the EN55032 Class A emission standard. This EVM utilizes a synchronous rectifier to minimize losses and improve efficiency.

The LMZ31704EVM-003 is designed to easily connect to different power supplies, and includes power source connectors for both AC and DC inputs. The board is also compatible with various existing power supply designs. It also includes an optional flying capacitor, which can be used in Voltage Multiplier applications.

In addition to evaluation, this board is suitable for use in a number of different off-line AC/DC SMPS applications. It is a compact and cost-effective solution that is suitable for space-constrained designs. The LMZ31704EVM-003 can be used to develop and prototype AC/DC & DC/DC applications such as laptop adapter, UPS systems, and Ethernet POE applications.

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